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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:17:52 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:17:52 +0000 |
| commit | 3afb00d3f86d3d924f88b56fa8285d4e9db85852 (patch) | |
| tree | 95a985d3019522cea546b7d8df621369bc44fc6c /arch/riscv/kernel/sbi-ipi.c | |
| parent | Adding debian version 6.9.12-1. (diff) | |
| download | linux-3afb00d3f86d3d924f88b56fa8285d4e9db85852.tar.xz linux-3afb00d3f86d3d924f88b56fa8285d4e9db85852.zip | |
Merging upstream version 6.10.3.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/riscv/kernel/sbi-ipi.c')
| -rw-r--r-- | arch/riscv/kernel/sbi-ipi.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/riscv/kernel/sbi-ipi.c b/arch/riscv/kernel/sbi-ipi.c index a4559695ce..1026e22955 100644 --- a/arch/riscv/kernel/sbi-ipi.c +++ b/arch/riscv/kernel/sbi-ipi.c @@ -13,6 +13,9 @@ #include <linux/irqdomain.h> #include <asm/sbi.h> +DEFINE_STATIC_KEY_FALSE(riscv_sbi_for_rfence); +EXPORT_SYMBOL_GPL(riscv_sbi_for_rfence); + static int sbi_ipi_virq; static void sbi_ipi_handle(struct irq_desc *desc) @@ -72,6 +75,12 @@ void __init sbi_ipi_init(void) "irqchip/sbi-ipi:starting", sbi_ipi_starting_cpu, NULL); - riscv_ipi_set_virq_range(virq, BITS_PER_BYTE, false); + riscv_ipi_set_virq_range(virq, BITS_PER_BYTE); pr_info("providing IPIs using SBI IPI extension\n"); + + /* + * Use the SBI remote fence extension to avoid + * the extra context switch needed to handle IPIs. + */ + static_branch_enable(&riscv_sbi_for_rfence); } |